Manufacture of wooden belt-pulleys.



H. WOTTLE. MANUFACTURE OF WOODEN BELT PULLEYS.

APPLICATION FILED PEB.12, 1912.

Patented July 1, 1913.

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COLUMBIA PLANOGHAPII 1:0,, WASIHNOTON. u, c.

HANS WOTTLE, 0F VIENNA, AUSTRIA-HUNGARY.

MANUFACTURE OF WQODEN BEL'R-PULLEYs.

Specification of Letters Patent.

Tatented J u ly 1, 1913.

application filed February 12, 1912. Serial No. 677,113.

"0 all whom J15 may concern Be it known that I, Hans \Vo'r'rLn, a subject of the Emperor of AustriaHungary, residing at 66 Embelgasse, Vienna,in the Empire of Austria-llungary, have inventgear wheels 10 which meshwith racks 1.1 on

ed certain new and useful Improvements in the Manufacture of \VoodenBelt-Pulleys, of which the following is a specification.

The present invention relates to a method" of and apparatus forassembling wood belt pulleys, the object being to provide a morerational or systematic method of production than has hitherto been thecase by means of which the pulleys can be manufactured with aconsiderably less expenditure of time and far more exactly. Afundamental. condition of this method of production is that the segmentsof which the pulleys are composed must be cut with absolute exactituderegards the radius and the chamfering for which purpose a machine isnecessary which will form the object of a separate patent.

In the accompanying drawing: Figure 1 is an elevation partly in sectionand Fig. 2 is a plan of the apparatus.

The object particularly aimed at by this invention is to obtain pulleyscomposed of superposed layers or adjacent segments, the cylindricalsurface of such pulleys being as smooth as possible so as to reduce thefinishing work to the minimum. i i

A further obj eet is to provide an apparatus permitting of carrying outthe method explained below.

The method in accordance with my invention consists in successivelyinserting and pressing the segments constituting each layer of thepulley in combination with the layers already formed in an openresilient ring, the several layers being glued and then nailed one toanother.

The apparatus used in this method consists broadly of a resilient openring 1 adapted to be contracted and expanded by means of a right andleft-handed screw spindle 2. Instead of making this ring resilient itmight of course be hinged, but a resilient ring has proved to besuperior in practice. The screw spindle comprises two threaded cheeks 3upon which the lugs t on the ring 1 (which must be changed according tothe diameter of the pulley to be manufactured) are secured by means ofscrews. The threaded portions 3 and the screw spindle 2 are mounted in acasing 5 which is integral with the table ring 6. As this ring 1 variesin diameter accordii lg to the size of pulley to be manufactured it issecured to; the table 8 by means'of slot guides The work plate 2) 1ssecured to a d splaceable guide column inside the tablering and by meansof two the frame 12 and by means of a common '1 shaft13 mounted inbearings 19 on the work 1 plate 9 can be raised and lowered by means ofhand wheel 14 secured on said shaft. To permit offixing the work platein any position the guide column 1.5 provided with teeth in which a pawl18 actuated by a handle 16 and 'rotatably mounted on the uprightguide 17isable to engage- The apparatus is employed inthe following manner:"When the segments for the lowest layer of segments have been glued ontheir chan'ltei'ed faces they are inserted in the opened ring 1whereupon they are pressed tightly together by rotating the screwspindle 2. llereupon the segments of which the second segmental ring isto be composed and also the two spoke portions are glued at the properplaces and as shown in 1* ig. 2 placed upon the first layer afterpreviously opening the ring 1 by rotating the screw spindle. when thetwo layers of segments have been compressed they are nailed together andafter opening the ring 1 the se ments torthe thii'd layer are insertedand so on until a pulley of the desired width has been formed. Each timea fresh layer of segments has been arranged in place the work plate isset lower by actuating the gear wheels 10 and the pawl 18 to the extentof one tooth, the height of which, corresponds to the thickness of alayer of: segments.

Having thus described my iiwention, what I claim as new, and desire tosecure by Letters Patent is :v

1. A method of assembling wooden belt pulleys in which the segmentsconstituting each layer of the pulley are successively inserted in aresilient ring, glued to the layers already formed, pressed incombination with them in said resilient ring and nailed one to theother.

2. A method of assembling wooden belt pulleys consisting in pressingtogether the segments forming the first layer in a resilient ring,inserting in said ring the segments forming the second layer and gluingthem to the first layer, pressing both layers to gether in said ring,nailing them to one another, inserting in said ring the segments formingthe third layer and so proceeding until a pulley of the desired widthhas been formed, the several layers being thus successively pressed incombination with the layers already formed.

3. A method of assembling wooden belt pulleys consisting in pressingtogether the segments forming the first layer in a resilient ring,opening said ring, lowering by suitable means the first layer a distanceequal to its own thickness, inserting in said ring the segments formingthe second layer and gluing them to the first layer, closing said ringand pressing both layers together in the same, opening said ring,nailing the layers to one another, lowering the two layers a distanceequal to the thickness of one layer, inserting in said ring the segmentsforming the third layer and so proceeding until a pulley of the desiredwidth has been formed, the several layers being thus successivelypressed in combination with the layers already formed.

4. In an apparatus for assembling wooden belt pulleys, the combinationof an open resilient ring secured to a table, a work plate movablevertically and arranged underneath said ring and means for lowering andraising said plate and for fixing it in position.

5. In an apparatus for assembling woo-den belt pulleys, the combinationof a table having an aperture through which a work plate is adapted tobe moved vertically, an open resilient ring removably secured to saidtable and held in position over said work plate by appropriate means,means for opening and closing said ring and means for vertically movingsaid plate and fixing it in position.

6. In an apparatus for assembling wooden belt pulleys the combination ofa table having a rigid ring surrounding an aperture, an open resilientring having lugs at its open ends, threaded checks in which a right andleft handed screw spindle engages, a casing guiding said cheeks andspindle and con nected to said table ring, a movable work plate adaptedto register with the table aper ture and means for lowering and raisingsaid plate and fixing it in position.

7. In an apparatus for assembling wooden belt pulleys the combination ofa table having an aperture, a workplate movable vertically and adaptedto register with said opening, a rigid table frame provided with 7vertical racks, a hand controlled shaft mounted in bearings on said workplate and carrying toothed wheels meshing with said racks, a guidecolumn rigidly connected to said work plate and provided with ratchetteeth, a fixed upright guide supporting said column and provided with apawl engaging said ratchet teeth, an open resilient ring secured to thetable and held in position over said work plate and a screw tighteningdevice for opening or closing said resilient ring.

In testimony whereof I afiix by signature in presence of two witnesses.

HANS WOTTLE.

Witnesses:

' AUGUST FUGGER,

ADA MARIA BERGER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

